I have a sunfish with the hardware shown in the image on the deck, obviously for a mainsheet block. I'm having a hard time finding a block and shackle that will fit in this 'base'. Does anyone recognize this fitting and can direct me to a block that was likely part of the fitting, but did not come with the sunfish? thank you for any insight you may have!
LaLi -
Thank you so much both for the information and especially the quick reply. I was able to find an appropriate Harken block on eBay and plan to be sailing away soon!!!